<!DOCTYPE html>
<html lang="zh-CN">
<head>
    <meta charset="UTF-8">
    <meta http-equiv="X-UA-Compatible" content="IE=edge">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>手写 jQuery</title>
    <style>
        .red { color: red; }
        .border { border: 1px solid red; }
    </style>
</head>
<body>
    <div class="test">
        你好1
        <div class="child">child1</div>
        <div class="child">child2</div>
        <div class="child">child3</div>
    </div>
    <div class="test">
        你好2
        <div class="child">child1</div>
        <div class="child">child2</div>
    </div>
    <div class="test">
        你好3
        <div class="child">child1</div>
    </div>

    <script src="./jquery.js"></script>
    <script src="./main.js"></script>
</body>
</html>